Phase Equilibria Investigation of Binary, Ternary, and Higher Order Systems. Part 6: The Phase Equilibria in the Metal-Rich Region of the Hafnium-Tantalum-Nitrogen System

Abstract

The ternary alloy system tantalum-hafnium-nitrogen was investigated by means of melting point, X-ray, differential thermal analytical, and metallographic techniques. Also investigated were the two binary systems of tantalum-nitrogen and hafnium-nitrogen. In the ternary system, seven isothermal reactions occur: Three, Class II-type four-phase reactions and four limiting tie line reactions are observed. The observed phase relationships established during the course of this investigation are discussed, and isothermal sections from 1000 deg C to 3200 deg C as well as an isometric view of the ternary system are presented. In addition to the ternary system, phase diagrams for the two binary systems of tantalum-nitrogen and hafnium-nitrogen are also presented.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1969
Accession Number
AD0700985

Entities

People

  • Charles E. Brukl
  • Philip H. Booker

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  • Aerojet Rocketdyne Holdings

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  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Chemical Analysis
  • Chemistry
  • Composite Materials
  • Contracts
  • Copper
  • Crystal Structure
  • Cutting Tools
  • Fabrication
  • Grain Boundaries
  • Graphite
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  • Hafnium
  • Heating
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  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Melting Point
  • Phase
  • Phase Diagrams
  • Solid Solutions
  • Tantalum

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